Sorry, there not a way to enlarge the image on the excerpt view without making a lot of PHP edit. However, the enlarging the image in the full bio should be easier … I’m assuming you are referring to the single entry view of the template and not the fade open view.
If you’re comfortable w/ editing PHP.
card-single.php file found here:
Lines 9 and 10 have the height and width, change them to your desired size.
Of note, you could make a similar change to the
card.php file, however, you would have to make several other edits to the CSS to accommodate the larger size. What exactly, sorry, I couldn’t without doing them myself.
Hope that helps.